I'm new to this community and I wish you could help me with a video I recently downloaded.

The video is 900Mb and 1h04 duration but when I went to play it, it freezes at 00:12:33. Tried VLC, WMP, Media PLayer Classic. When I open it with VLC a message appears that the file is broken...and offers tyhe option to repair it or not. If I choose don't repair i could watch only the first 12 minutes and if I let it repair it starts to do the job but hangs at 19%

I then tried opening it with VirtualDub. It starts reconstructing the missing index block...Takes about 20 minutes to go through the 900Mb but then it recognizes only 22575 frames/12 minutes. Closed it and reopened it with VD checking the option "re-derive keyframe flags" only. Result; 12 minutes. Reopened again with VD with the options "re-derive keyframe flags" and "Open in AVIFile compatibility mode" checked. Result: a freezed VD.

I would normally say that sounds like a trick some fake uploaders do. They just present a few minutes of video and the rest of the file is padded with junk. But that appears to be an older video. Maybe just a corrupted file. I suspect there is likely no way to repair it. You could open it in something like VirtualDub's Hex Editor. I suspect you may see a lot of zeros if anything past the initial 12 minutes shows.

Thanks for your replies and advice. I think that something went wrong during the downloading of the file because I don't see why someone would fill with junk a video of a movie of the 50's few are interested in.